F0/100
Rock Hill Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 2,400 residents · New York
What's In Rock Hill's Tap Water?
2
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 3.23 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: November 1, 2022 – November 30, 2022Rule: Total Coliform RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
EMERALD GREEN LAKE LOUISE MARIE WC
Population Served
2,400
Water Source
Surface Water
System ID
NY5203346
Frequently Asked Questions About Rock Hill Water
Is Rock Hill tap water safe to drink?
Rock Hill, New York tap water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 185 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Rock Hill's water?
Of the 2 contaminants tested in Rock Hill's water supply, the most notable include Copper (90th percentile), Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Rock Hill have any water quality violations?
Yes, Rock Hill has 185 EPA violation(s) on record, with the most recent in 2022. Violation types include MON, MR, Other. None of these are classified as health-based violations.
Do I need a water filter in Rock Hill?
Based on EPA data, using a water filter in Rock Hill is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Rock Hill's tap water come from?
Rock Hill's drinking water is sourced from surface water and supplied by EMERALD GREEN LAKE LOUISE MARIE WC. The system serves approximately 2,400 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Rock Hill's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Rock Hill's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Rock Hill's water compare to other cities in New York?
Rock Hill's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our New York state page to see how all cities in the state compare.
What should I do if I'm concerned about Rock Hill's water quality?
If you have concerns about Rock Hill's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (EMERALD GREEN LAKE LOUISE MARIE WC) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.